Abstract
A mixture of isomeric phenyloxazines (2, 3) in a 5:4 ratio was synthesized via a [4 + 2] addition reaction of a heterocyclic diene-precursor prepared from bromoacetophenone oxime and the methyl ester of chrysenequinonecarboxylic acid (1). The structures of the synthesized compounds were confirmed using spectral methods.
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Tret'yakova, E.V., Flekhter, O.B., Galin, F.Z. et al. Synthesis of Phenyl-2,3-oxazine Derivatives of Chrysenequinonecarboxylic Acid. Chemistry of Natural Compounds 40, 391–393 (2004). https://doi.org/10.1023/B:CONC.0000048255.87504.d0
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DOI: https://doi.org/10.1023/B:CONC.0000048255.87504.d0